Piano-action.



No. 630,000. Patantod Aug. I, |899.

A D LUVENE PIIID ACTION. (1W-mu my s, 1m.)

(No Model.)

UNITED ASierras PATENT Ormes.

ANDREW D. LUVENE, Ollr CHICAGO, ILLINOIS, ASSIGNOR TO THE W. W. KIMBALLCOMPANY, OF SAME PLACE.

PIANO-ACTION.'

v SPECIFICATION-forming part of Application tiled lay 8. 1899. SerialNo. 715,902. (No model.)

To aZZ whom it may concern.-

Be it known that I, ANDREW D. LUVENE,

a citizen of the'Unit'ed States, residing in Chicago, in the county ofCook and State of Illinois, have invented a new and useful Improvementin Piano-Actions, of which the following is a speeiiication.

This invention relates to theconstruction of the actions used in grandpianos, and more especially tothe means used for regulating themovements of the jack usually employed with the repetition-lever.

The invention consists in the novel construction hereinafter describedand illustrated in the accompanying drawings. p

In said drawings, Figure l represents an elevation of that portion of agrand-piano action embracing my improvement. Fig'. 2 shows a modifiedconstruction.

In said drawings, A designates the hammer, secured to the rail B in theusual manner, and A' is the hammer-rest.

C is the repetition-lever, pivoted centrally to the post D, attached tothe horizontal hammer-rest-supporting bar E. The bar E is pivotallyconnected at one end toa bracket F, rigidly joined to the action-railGr, and is also supported from the key-lever (not shown) by a buied fromits under surface. This block is located near the center of the bar. Thehammer and action-rails are sustained by metal frames .A2 in the usualmanner.

The repetition-jack J is elbow-shaped, the main portion being arrangedto stand at an incline from the vertical, and its foot or letoi J beingarranged to project horizontally, or nearly so. 'The jack is positionedin a slot formed in the bar` E and indicated by the broken lines e e andpivoted therein upon the pivot E. The upper end of the jack plays in aslot in the repetition-lever (indicated by the broken lines c c) andprovided with bufing material C at one end, and it actuates the hammerthrough the medium cfa buffer or knuckle J, attached to the hammerarm.

block H, projecting downwardy The let-od strikes the usual 1ct-off screw.I3 when the jack is raised.

lThe action of therepetition-lever is regulated in. the usual manner bythe screw (l2,

ybearing upon the bar E, and the stop C3, consistingof a wire secured insaid bar and having a right-angle bend extending-over the top of thelever, the screw limiting movement by the lever in one directionand thestop in the other.

C4 is a spring acting to keep the lever in its normal position.

The action of the jack is regulated by means of a set-screw J4, passingthrough the end of bar E, as seen, land bearing against the foot of thejack. The bar E is extended at this end for the double purpose ofsupporting the regulating-screw and of pivoting the jack in a closedinstead of an open-ended slot, as has been the custom heretofore.

In the modified construction shown in Fig. 2 the regulating-screw ispassed through the bar in an angling direction, which makes it more easyof access for adjustment. I prefer also where this is done to odset theend of the bar, as at J5.

The spring J6 retains the jack in the position shown at Fig. l, thisbeing its normal position.

I claim- 1. The grand-piano action having its jack regulated by a screwpassed downwardly through ahorizontal extension of the rest-supportingbar, and coming directly in contact with the foot portion of the jack,substantially as specified.

2. The grand-piano action having its jack regulated by a screw passeddiagonally through anextension of the rest-supporting b'ar, andvcomingdirectly in Contact with the foot of the jack, substantially asspecified.

ANDREW D. LUVENE.

Witnesses:

EDWD. S. EvARrs, H. M. MUNDAY.

